The invention relates to the technical field of flame retardancy of polymer materials, and in particular, relates to a flame retardant for a smoke suppression type sports floor; the flame retardant includes melamine salt, modified attapulgite, polytetrafluoroethylene, vinyl alcohol, acrylonitrile and nitrile rubber as main raw materials and includes the components in parts by weight: 0.5-5 parts of melamine salt, 2-4 parts of modified attapulgite, 50-80 parts of polytetrafluoroethylene, 10-20 parts of vinyl alcohol, 5-10 parts of acrylonitrile, 10-15 parts of nitrile rubber, 1-1.5 parts of ammonium polyphosphate, and 2-4 parts of magnesium aluminate. The flame retardant can effectively suppress the generation of smoke, reduces the environmental pollution and people damage caused by the generation of the smoke.